I just wanted to share my process with modelling the main building for my city. It has changed a little from the concept art as I thought that if I were too take the building design straight from that artwork, it would have been quite bland and uninteresting. So I just decided to take my original orthographic drawing and mix the two together to create something a little more interesting.
The spires/glass structures at the sides of the building are spike at the moment, I hope to soften them up in towards the end so they reflect the jewellery of Lalique, rather then some evil fortress type of design. So ignore the shapes for now.